What is defined as "masculine" and "feminine" will depend on the males and females that make up the population you are making your generalizations about.
If you talk about the birds, food gathering and homemaking responsibilities are often shared. If you talk about the bees, the women run the show and men are little more than lazy sperm donors. If you talk about humans, it will depend on where in the world and what period of history you are looking at.
That femininity is a weakness, seems to be a human male conceit. I wouldn't torment a cub in front of a lioness.